A poor college graduate travels back to San Francisco in the 1990s, and his portable system requires him to become one of the world’s most influential people. What should he do? It’s too difficult! Enter politics and become president of the United States? Forget about dreaming… engage in research and become a contemporary Einstein? Forgive me, an ordinary person… Finish bin Laden’s affairs in advance, and then become famous overnight and reach the top? …After one night, will he be assassinated by the FBI or bombed by the US army? Not even reliable! Forget it, let’s just start from being a child star. [Newcomers are writing, please feel free to post, don’t be shy.